If your destination is east of Village Center Drive (shown in blue), use Yorba Linda Boulevard/Weir Canyon Road from the Riverside Freeway to get to and from your destination. If your destination is west of Village Center, use Imperial Highway to the greatest extent possible to get to and from your destination.
Mouth ulcers are caused by many disorders. These include: 1  Canker sores. 2  Gingivostomatitis. 3  Herpes simplex (fever blister). 4  Leukoplakia. 5  Oral cancer. 6  Oral lichen planus.
A mouth ulcer is the loss or erosion of the delicate lining tissue of the mouth (mucus membrane). The most common cause is mechanical injury, such as accidentally biting your cheek. In most cases, mouth ulcers are harmless and resolve by themselves in a few days without the need for medical treatment.